Patents by Inventor Alkis Paraskevopoulos

Alkis Paraskevopoulos has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Method of manufacturing a broadband high emission power semiconductor laser from a BRS type buried stripe structure, and resulting laser
    Patent number: 5043291
    Abstract: The present invention concerns a method for manufacturing a buried stripe semiconductor laser comprising the steps of depositing by epitaxy at least the heterostructure (51, 52, 53, 54) comprising at least one active material layer (53) on a substrate (50) and then depositing a dielectric mask (55) over the structure thus obtained and etching the latter through the mask (55) to obtain stripes in the active material layer (53) and any layer or layers (54) previously deposited by epitaxy over the active material layer (53), then carrying out impurity ionic implantation in the structure, protecting the active material stripes (53) and any layer or layers (54) that may have been deposited over this material by means of a mask (55) that is not transparent to ionic implantation.
    Type: Grant
    Filed: September 7, 1989
    Date of Patent: August 27, 1991
    Assignee: Centre National d'Etudes des Telecommunications
    Inventors: Pascal Devoldere, Alkis Paraskevopoulos